Find sum of even index binomial coefficients | C # Program to find sum even indexed Binomial Coefficient . ; Returns value of even indexed Binomial Coefficient Sum which is 2 raised to power n - 1. ; Driver Code
using System ; class GFG { static int evenbinomialCoeffSum ( int n ) { return ( 1 << ( n - 1 ) ) ; } public static void Main ( ) { int n = 4 ; Console . WriteLine ( evenbinomialCoeffSum ( n ) ) ; } }